velpic(1)

NAME
velpic - interactive graphical design of a matrix

DESCRIPTION
   [vel,regionlist,linelist,seedlist,velolist]=velpic(nz,nx) Macro which interactively defines regions of a matrix. Closed surfaces inside the frame are not allowed.

nz  :Number of columns in the matrix

nx  :Number of rows in the matrix

vel :the matrix

regionlist
    :list whose elements are matrices of dimension (2xN) containing the indices of the different regions

linelist
    :list whose elements are matrices of dimension (2xM) containing the indices of the different lines

seedlist
    :(2xK) vector containing positions of seeds

velolist
    :(1xK) vector containing velocities associated to seeds